Asymmetry index (hereafter ASYM;
[1]}). This parameter describes the level of
asymmetry in the shape of one galaxy. It is calculated by comparing an
object flux in every pixel using an original image and the rotated one
by \(180^{o}\) , and taking into account the background. It can be
expressed as:
\(ASYM =\frac{\Sigma {|I(i,j)-I_{180}(i, j)|/2}}{I(i, j)}-\frac{\Sigma {|B(i,j)-B_{180}(i, j)|/2} }{I(i, j)},\) 
